package xjtu.sad.zbsj.common.dao;

import xjtu.sad.zbsj.common.model.user.User;

import java.util.Date;

public interface CommonDao {
	User getUserByU_id(String userId);

	String getU_avatarByU_name(String u_name);

	String selectU_nameByU_id(String u_id);

    //String getNewT_Id();

	void addTime(String t_id, Date t_happen);
}
